Cross Mini Ballpoint 8518 (D, D1) Refill - The Pen Refill Guide
Monteverde Soft Roll Ballpoint Pen Refill - D1 - 0.7 mm - Blue Black - Pack of 4 | JetPens
Guide to D1 Refills | JetPens
Jaymo Replacement for Cross 8518-6 and Schmidt 635 - Measures 2.625 in / 67 mm Long - D (D1) Standard Multifunction Mini Ballpoint Pen Refill - 6 Blue - Walmart.com
Amazon.com: Ballpoint Pen Metal Mini Refill D1/635 Refill- Medium Point Refill for Multifunction Pen,Mini Pen Compact Pen(Blue ink 8 pack) : Everything Else
Parker Compatible Mini Ballpoint Pen Refill - D1 Mini Pocket Pen Refills | eBay
Monteverde Soft Roll Ballpoint Pen Refill - D1 - 0.7 mm - Blue Black - Pack of 4 | JetPens
Schmidt 635 Mini D1 Ball Pen Refill - Blue - 1 Pack (Lamy M21 and Cross 8518-4 Compatible) - Walmart.com
Amazon.com : Monteverde D1 Ballpoint Refill to Fit Mini and Multi Functional Pens, Medium Point, Soft Roll, 10 Per Pack (Bulk Packed) (Blue) : Office Products
Kaweco Soul D1 Ballpoint Pen Refill - 1.2 mm - Blue - Pack of 5 | JetPens